7 General Maintenance
To Disassemble the EI SS or EI Inert Source
198 5977B Series MSD Operating Manual
To Disassemble the EI SS or EI Inert Source
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Hex ball driver, 1.5 mm (8710-1570)
• Hex ball driver, 2.0 mm (8710-1804)
• Wrench, open-end, 10 mm (8710-2353)
Procedure
Refer to the exploded parts view Figure 64 and the EI SS and EI Inert parts list
Table 20 on page 199 while using this procedure.
1 Remove the EI source. (See “To Remove the EI HES” on page 178 or “To
Remove the EI XTR, SS, or Inert Source” on page 196.)
2 Remove the two gold plated screws from the filaments and remove the
filaments from the source.
3 Loosen the two gold plated screws from the source heater block assembly,
and separate the repeller assembly from the source body. The repeller
assembly includes the source heater block assembly, repeller, and related
parts.
4 Remove the repeller nut and washers then remove the repeller from the
source heater block assembly.
5 Remove the repeller insulators and the repeller block insert from the source
heater block assembly.
6 Remove the gold plated setscrew from the side of the source body.
7 Push on the drawout plate to remove the entrance lens, ion focus lens,
drawout cylinder, and drawout plate from the other end of the source body.
8 Unscrew the interface socket. A 10-mm open-end wrench fits the flats on the
interface socket.
9 Remove the entrance lens and ion focus lens from the lens insulator.
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